.wrap {
    width: 100px;
    display: grid;
    grid-template-columns: repeat(3, 20px);
    /* grid-column-gap: 20px; */
    row-gap: 20px;
    /* justify-items: start center end; */
    justify-content: space-between;
    border: 1px solid #eee;
}

.wrap>div {
    width: 20px;
    height: 20px;
    background: red;
    text-align: center;
    line-height: 20px;
}